It's also all over the place as a story, but that seems to work thematically. Everything in this is a mess with no real purpose to it (again, nihilism). Like it's sort of implied that the world they're in is some sort of multi-dimensional sinkhole where everything and it's mother gets sucked in and can't escape and so is sort of one big rubbish heap (if you'll allow my own interpretation there). The protagonist goes around kind of aimlessly like the spacey sort that he is. And of course, lots of people die (cities worth of them) for no particular reason as such. So of course the moment-to-moment plot is a mess, too. The progression, such as it exists, seems to be more along the lines of a set of emotional states, rather than along the story. Really, the whole series needs a therapy session.